Barthelme led circuit board in small chip on board design white barthelme 61300432 led circuit board in scob design small chip on board the advantage of this technology is uniform dissipation of heat via copper carrier on the heat sink thus results in a simplified thermal management a redundancy arises by using several small led chips another advantage is the uniform and wide angle of radiation and high lm w efficiency barthelme 61300432 led circuit board in small chip on board desig